Hi Chuck,
The Lambs Club members always congregate at St. Edmunds Hall. I think perhaps Sam might go there automatically if everything else has been done in the chapter.
Check your progress bar (press P on your keyboard) and see what percentages are at less than 100%, i.e. there are still things you need to do.
Also check your map -- are there any locations that are not yet fully greyed out?
A gold location still has a puzzle or bonus action to be done.
A silver location still has a bonus action to be done.
I know that even a little thing can hold you back here - for instance, not having read all the newspaper articles in the library. It's probably just some little thing like that which is impeding your progress.
Let us know how it goes.